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HAND ROCK DRILL. No. 337,887. Patented Mar. 16, 1886.

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HAND ROGK DRILL. No. 337,887. 4 Patented Mar. 16, 1886.

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H. SWAIN.

HAND BOOK DRILL. No. 337,887. Patented Mar. 16, 1886.-

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.a'rnnr HAD\VEN S\VAIN, OF DENVER, COLORADO.

HAND ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 337,887, dated March 16, 1886.

Application filed Septembcr6,1884. Serial X0. 112,422.

To all whom it may concern:

Be it known that I, HAnwEN SWAIN, a citizen of the United States, residing at Denver, in the county of Arapahoe, in the State of Colorado, have invented new and useful Improvements in Hand Rock-Drills, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 represents a side elevation of my improved drill; Fig. 2, a top view of the same; Fig. 3. a detail view of the drill-carrying barrel; Fig. 4, a detailed perspective view of the piece S; Fig. 5, a detail view of the hammer for operating the drill and the mainspring and angle-piece operating in connection therewith. Fig. 6 is a view of the rear end of the drill with the coupling removed. Fig. 7 represents the back piece, P, and a section of the same. Fig. 8 represents a front and a side View of the part M. Fig. 9 represents a sectional view of the tube O with the drill-spindle and hammer; Fig. 10, a detail view of the eccentric for throwing the drill in and out. Fig. 11 shows a side elevation of the double spindle for plug and feather or quarry work; Fig. 12, a detail view of the spiral feed-ratchet; Fig. 13, a bottom view of the coupling;

Fig. 14, a top viewof the main frame and the coupling. Fig. 15 represents a flat drill bent suitably for the machine. Fig. 16 shows the manner in which the drill works in the aperture. Fig. 17 is a side elevation of the supporting-bar. Fig. 18is aside elevation of the circular wedge for tightening the supporting bar. Fig. 19 represents the two wings of the clamping-ring 12. Fig. 20 is a longitudinal sectional view of the drill, and Fig. 21 is a front view of the operatingsegment.

The machine is designed to be located in any portion of the mine, and is supported by an extension-pipe standard, to which it is fastened by means of the coupling, which is constructed in two parts that are hinged togeth er and tightened around the standard by the bolt a.

The lower part of the coupling A (indicated by the letter b, Fig. l4) slips in a suitable projection on the main frame B, Fig. 13, in such a manner that when turned in any other direction except parallel with the standard two lugs on the part b will slip under the (No model.)

shoulder on the frame B and securely lock the two together, the bolt b holding them in place.

Through a longitudinal opening in the frame B the tube 0 passes, and it is free to move backward and forward in the former.

Projecting upward from the frame B is the supporting-tube O, which terminates in the pointed screw 0. The latter is screwed againstthe rock for the purpose cf steadylng the machine.

Fastened securely to the front end of the tube O is a block, M, through which passes the tube 0. The latter being parallel to the tube C, serves to guide the block M when moved backward or forward, and prevents the tube 0 from revolving. The block M carries a bell-crank lever, G, to which is fastened a segmental rack, T, which is pivoted at 2. Through the lower part of the block M passes the stud 3, on which oscillates the internal segmental gear, H, which intermeshes with the segmental rack T.

The lever I has corrugations on it which fit or engage similar corrugations on the part H, being held against the latter by a nut on the stud 3. On being oscillated the lever gives to the part H an oscillating movement, which transmits a similar motion through the segmental rack to the bell-crank G.

To each end of the bell-crank G are pivoted the arms d d, which alternately push against the head of the hammerbar L.

On the arms (I d are inclines 5, which during the backward stroke come in contact with theincline 4 on the block P, which moves the arm off from the end of the hammer-head and allows the latter to be driven by the spring 8 to strike theend of the drill-steel which projects into the tube D.

Friction-rollers maybe provided at the ends of the arms dd, to cause the latter to Work more easily.

The inclined pieces 6 6,fastened to the backs ofthe arms dd, coming into contact with the pin O, (which passes outside of the arms d d down through two suitable lugs on the block P,) return the arms (I d alternately to their original position, ready for the next stroke.

Through the inside of the pipe 0 extends the drill-carrying tube D. On the back end of the latter is a flange, D, while on the front end is a ratchet, g. i

'The drill-steel is connected to the tube D by means of the taper nut N, which is partly split into three or more parts, as shown.

To the rear end of the tube 0 is securely fastened the block P, to which the anglepiece S is secured.

Inside of the drill-tube D is the hammer L, around which is coiled the mainspring 8, Fig.

5, and on the end of which is a projection for the operating-arms to push against, as before mentioned. The hammer bar L is partly turned downward, so as to leave a shoulder, Z, which during and near the end of its backward stroke comes in contact with the collar g on the inside ofthe tube D, to which it is fastened,and thus draws the drill a short distance away from the rock. A pawl, e, which is 10- eated in a suitable opening in the head M, is pressed against the spiral ratchet g by a coiled spring underneath,so that as the tube D moves back ward the ratchet and pawl cause the tube D to make a part of a revolution. The tube D is returned to the rock by the spring 7, which is coiled outside of the mainspring 8. One end of the spring 7 rests against the tube D and the other is held by the piece S. The friction of this spring forces the tube D straight ahead and causes the pawl e to pass overinto the next groove. The mainspring 8 has one end resting against the head or shoulder on the hammer L, the other end being held by the angle-piece S, which has a suit able opening through which the hammer L passes. The latter is prevented from turning by a feather in a groove in said hammer.

The angle-piece S is fastened to the tube D by one or more slotted apertures, through which pass the bolts or pins, the slots beingso shaped that by pressing on the handle fastened to the angle-piece S the latter can be unhooked from the block P by a forward and upward movement, and the drill and holdingtube D,together with its contents and the drillsteel, can be drawn baekward,without chang-. ing the position of the machine, for the purpose of changing the steel or cleaning the hole.

Through the opening 0 in the block P the feed-rod F passes. The other end of said feedrod F slides through the eccentric 0, Figs. 20 and 10, which is held in c in the lower front end of the frame B.

Suitable collars are located at c, to prevent lateral motion of the rod F. Fastened to the latter is a worm, U, which receives its motion from the rod F. The worm U meshes with the rack k, which is fastened to the two ends of the frame B. v

Outside of the block P, and sliding on a feather on the rod F, is a spiral ratchet, K, which has a groove formed in it, in which the flange D fits, and from which ratchet K receives a backward and forward motion.

On each side of the ratchet K are located the pawls i and j, which are pivoted to the block P and are pressed against K by the springs i and j, which are held by suitable supports in the block P. The end of the spring iwhich operates the ratchet K is made with a bevel, so that when the flange D moves backward, carrying the ratchet K with it, the bevel of 1' gives the ratchet K a spiral movement. The end of the pawl j, being hooked, at the end of the backward stroke catches in a tooth on the ratchetK and causes the latter to move directly forward upon the tube D,

- which is pressed against the rock by the spring 7. Should the tube have fed too fast, the flange D will be held by the ratchet K away from the block P; hence the pawli will not be able to drop under another tooth onthe ratchet K. The feed will be automatically regulated. The eccentric throws the worm Uinor out of engagement with the rack k, to enable the tube 0 to be moved toward or from the rack.

Having thus described my invention,what I claim, and desire tosecure by Letters Patent, 1s

1. The combination, with the main frame B, having an annularly-grooved projection, b, of the coupling A,constructed in two parts hinged together, and provided with lugs to enter the groove, and a confining-bolt, whereby the drill may be secured to a suitable support, substantially as specified.

2. The combination, with the main frame B,

. the drill-tube O, and the actuatingblock M, of the crank G and its pinion, the intermeshing segment-rack H, the actuating-lever I, and connected rods d and d, whereby the ham merrod is forced backward at intervals, substantially as specified.

3. The combination, with the hammer-rod L and its head, of the actuating-arms dd and the block P, having inclined openings, through which the inclined portions of the rods d d pass, whereby they are caused to release the head at the proper time, substantially as and for the purposes specified.

4. The combination, with the main frame B and drill-tube D, of the hammer-rod L and its head, the actuatingarms d d, the block P,and the mainspring 8, all arranged to operate substantially in the manner specified.

5. The combination, with the main frame B, of the advancing rack k, the rod E, and intergearing worm U, the sliding ratchet K, feathered upon the rod F, the tube D and flange D, and the pawls 11;, adapted to engage the ratchet, the whole arranged to operate substantially in the manner specified.

HADWEN SWAIN.

Witnesses:

J. H. RICHARDS, J AS. H. BROWN. 

